What does this mean?

Hi reddit! I haven’t been here for a while but may I ask why is my parrot cockatoo like this? I am an owner for a while of a white cockatoo and I’m still learning of his mannerisms and all that. As from the video above, his feathers are puffed up and can’t stop screeching(?). Screams every time when I leave for a second. Even though I fed him and gave him attention, he’ll still scream like bloody murder or smthing. He wasn’t like this before our trip to our hometown, with him in a cage. I have a feeling he’s just feeling stressed bcs of the moving. But this was going for days and my mom is annoyed. Idk what to do pls help

(Note: the video was taken after he was put in the cage.)